//
// Created by 11510 on 2024/6/8.
//
#include <unistd.h>
#include <iostream>
using std::cin;
using std::cerr;
using std::cout;
using std::endl;


void test0(){
    for (int i = 0; i < 1030; ++i) {
        cout << 'b';
    }
//    cout << endl;
    cout.flush();
    sleep(2);
}

void test1(){
    cerr << 1 << endl;
    cerr << 2 << endl;
    sleep(3);
}


int main() {
    test1();
    return 0;
}
